includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4
   5 /**
   6  * @todo document
   7  */
   8 class OutputPage {
   9         var $mMetatags = array(), $mKeywords = array(), $mLinktags = array();
  10         var $mExtStyles = array();
  11         var $mPagetitle = '', $mBodytext = '', $mDebugtext = '';
  12         var $mHTMLtitle = '', $mIsarticle = true, $mPrintable = false;
  13         var $mSubtitle = '', $mRedirect = '', $mStatusCode;
  14         var $mLastModified = '', $mETag = false;
  15         var $mCategoryLinks = array(), $mCategories = array(), $mLanguageLinks = array();
  16
  17         var $mScripts = '', $mLinkColours, $mPageLinkTitle = '', $mHeadItems = array();
  18         var $mInlineMsg = array();
  19
  20         var $mTemplateIds = array();
  21
  22         var $mAllowUserJs;
  23         var $mSuppressQuickbar = false;
  24         var $mDoNothing = false;
  25         var $mContainsOldMagic = 0, $mContainsNewMagic = 0;
  26         var $mIsArticleRelated = true;
  27         protected $mParserOptions = null; // lazy initialised, use parserOptions()
  28
  29         var $mFeedLinks = array();
  30
  31         var $mEnableClientCache = true;
  32         var $mArticleBodyOnly = false;
  33
  34         var $mNewSectionLink = false;
  35         var $mHideNewSectionLink = false;
  36         var $mNoGallery = false;
  37         var $mPageTitleActionText = '';
  38         var $mParseWarnings = array();
  39         var $mSquidMaxage = 0;
  40         var $mRevisionId = null;
  41         protected $mTitle = null;
  42
  43         /**
  44          * An array of stylesheet filenames (relative from skins path), with options
  45          * for CSS media, IE conditions, and RTL/LTR direction.
  46          * For internal use; add settings in the skin via $this->addStyle()
  47          */
  48         var $styles = array();
  49
  50         /**
  51          * Whether to load jQuery core.
  52          */
  53         protected $mIncludeJQuery = false;
  54
  55         private $mIndexPolicy = 'index';
  56         private $mFollowPolicy = 'follow';
  57         private $mVaryHeader = array( 'Accept-Encoding' => array('list-contains=gzip'),
  58                                                                   'Cookie' => null );
  59
  60         /**
  61          * Constructor
  62          * Initialise private variables
  63          */
  64         function __construct() {
  65                 global $wgAllowUserJs;
  66                 $this->mAllowUserJs = $wgAllowUserJs;
  67         }
  68
  69         public function redirect( $url, $responsecode = '302' ) {
  70                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  71                 $this->mRedirect = str_replace( "\n", '', $url );
  72                 $this->mRedirectCode = $responsecode;
  73         }
  74
  75         public function getRedirect() {
  76                 return $this->mRedirect;
  77         }
  78
  79         /**
  80          * Set the HTTP status code to send with the output.
  81          *
  82          * @param int $statusCode
  83          * @return nothing
  84          */
  85         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  86
  87         /**
  88          * Add a new <meta> tag
  89          * To add an http-equiv meta tag, precede the name with "http:"
  90          *
  91          * @param $name tag name
  92          * @param $val tag value
  93          */
  94         function addMeta( $name, $val ) {
  95                 array_push( $this->mMetatags, array( $name, $val ) );
  96         }
  97
  98         function addKeyword( $text ) {
  99                 if( is_array( $text )) {
 100                         $this->mKeywords = array_merge( $this->mKeywords, $text );
 101                 } else {
 102                         array_push( $this->mKeywords, $text );
 103                 }
 104         }
 105         function addScript( $script ) {
 106                 $this->mScripts .= $script . "\n";
 107         }
 108
 109         /**
 110          * Register and add a stylesheet from an extension directory.
 111          * @param $url String path to sheet.  Provide either a full url (beginning
 112          *             with 'http', etc) or a relative path from the document root
 113          *             (beginning with '/').  Otherwise it behaves identically to
 114          *             addStyle() and draws from the /skins folder.
 115          */
 116         public function addExtensionStyle( $url ) {
 117                 array_push( $this->mExtStyles, $url );
 118         }
 119
 120         /**
 121          * Add a JavaScript file out of skins/common, or a given relative path.
 122          * @param string $file filename in skins/common or complete on-server path (/foo/bar.js)
 123          */
 124         function addScriptFile( $file ) {
 125                 global $wgStylePath, $wgStyleVersion;
 126                 if( substr( $file, 0, 1 ) == '/' ) {
 127                         $path = $file;
 128                 } else {
 129                         $path =  "{$wgStylePath}/common/{$file}";
 130                 }
 131                 $this->addScript( Html::linkedScript( "$path?$wgStyleVersion" ) );
 132         }
 133
 134         /**
 135          * Add a self-contained script tag with the given contents
 136          * @param string $script JavaScript text, no <script> tags
 137          */
 138         function addInlineScript( $script ) {
 139                 $this->mScripts .= Html::inlineScript( "\n$script\n" ) . "\n";
 140         }
 141
 142         /**
 143          * Get all registered JS and CSS tags for the header.
 144          */
 145         function getScript() {
 146                 return $this->mScripts . $this->getHeadItems();
 147         }
 148
 149         function getHeadItems() {
 150                 $s = '';
 151                 foreach ( $this->mHeadItems as $item ) {
 152                         $s .= $item;
 153                 }
 154                 return $s;
 155         }
 156
 157         function addHeadItem( $name, $value ) {
 158                 $this->mHeadItems[$name] = $value;
 159         }
 160
 161         function hasHeadItem( $name ) {
 162                 return isset( $this->mHeadItems[$name] );
 163         }
 164
 165         function setETag($tag) { $this->mETag = $tag; }
 166         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 167         function getArticleBodyOnly() { return $this->mArticleBodyOnly; }
 168
 169         function addLink( $linkarr ) {
 170                 # $linkarr should be an associative array of attributes. We'll escape on output.
 171                 array_push( $this->mLinktags, $linkarr );
 172         }
 173
 174         # Get all links added by extensions
 175         function getExtStyle() {
 176                 return $this->mExtStyles;
 177         }
 178
 179         function addMetadataLink( $linkarr ) {
 180                 # note: buggy CC software only reads first "meta" link
 181                 static $haveMeta = false;
 182                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 183                 $this->addLink( $linkarr );
 184                 $haveMeta = true;
 185         }
 186
 187         /**
 188          * checkLastModified tells the client to use the client-cached page if
 189          * possible. If sucessful, the OutputPage is disabled so that
 190          * any future call to OutputPage->output() have no effect.
 191          *
 192          * Side effect: sets mLastModified for Last-Modified header
 193          *
 194          * @return bool True iff cache-ok headers was sent.
 195          */
 196         function checkLastModified( $timestamp ) {
 197                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 198
 199                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 200                         wfDebug( __METHOD__ . ": CACHE DISABLED, NO TIMESTAMP\n" );
 201                         return false;
 202                 }
 203                 if( !$wgCachePages ) {
 204                         wfDebug( __METHOD__ . ": CACHE DISABLED\n", false );
 205                         return false;
 206                 }
 207                 if( $wgUser->getOption( 'nocache' ) ) {
 208                         wfDebug( __METHOD__ . ": USER DISABLED CACHE\n", false );
 209                         return false;
 210                 }
 211
 212                 $timestamp = wfTimestamp( TS_MW, $timestamp );
 213                 $modifiedTimes = array(
 214                         'page' => $timestamp,
 215                         'user' => $wgUser->getTouched(),
 216                         'epoch' => $wgCacheEpoch
 217                 );
 218                 wfRunHooks( 'OutputPageCheckLastModified', array( &$modifiedTimes ) );
 219
 220                 $maxModified = max( $modifiedTimes );
 221                 $this->mLastModified = wfTimestamp( TS_RFC2822, $maxModified );
 222
 223                 if( empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 224                         wfDebug( __METHOD__ . ": client did not send If-Modified-Since header\n", false );
 225                         return false;
 226                 }
 227
 228                 # Make debug info
 229                 $info = '';
 230                 foreach ( $modifiedTimes as $name => $value ) {
 231                         if ( $info !== '' ) {
 232                                 $info .= ', ';
 233                         }
 234                         $info .= "$name=" . wfTimestamp( TS_ISO_8601, $value );
 235                 }
 236
 237                 # IE sends sizes after the date like this:
 238                 # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 239                 # this breaks strtotime().
 240                 $clientHeader = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 241
 242                 wfSuppressWarnings(); // E_STRICT system time bitching
 243                 $clientHeaderTime = strtotime( $clientHeader );
 244                 wfRestoreWarnings();
 245                 if ( !$clientHeaderTime ) {
 246                         wfDebug( __METHOD__ . ": unable to parse the client's If-Modified-Since header: $clientHeader\n" );
 247                         return false;
 248                 }
 249                 $clientHeaderTime = wfTimestamp( TS_MW, $clientHeaderTime );
 250
 251                 wfDebug( __METHOD__ . ": client sent If-Modified-Since: " .
 252                         wfTimestamp( TS_ISO_8601, $clientHeaderTime ) . "\n", false );
 253                 wfDebug( __METHOD__ . ": effective Last-Modified: " .
 254                         wfTimestamp( TS_ISO_8601, $maxModified ) . "\n", false );
 255                 if( $clientHeaderTime < $maxModified ) {
 256                         wfDebug( __METHOD__ . ": STALE, $info\n", false );
 257                         return false;
 258                 }
 259
 260                 # Not modified
 261                 # Give a 304 response code and disable body output
 262                 wfDebug( __METHOD__ . ": NOT MODIFIED, $info\n", false );
 263                 ini_set('zlib.output_compression', 0);
 264                 $wgRequest->response()->header( "HTTP/1.1 304 Not Modified" );
 265                 $this->sendCacheControl();
 266                 $this->disable();
 267
 268                 // Don't output a compressed blob when using ob_gzhandler;
 269                 // it's technically against HTTP spec and seems to confuse
 270                 // Firefox when the response gets split over two packets.
 271                 wfClearOutputBuffers();
 272
 273                 return true;
 274         }
 275
 276         function setPageTitleActionText( $text ) {
 277                 $this->mPageTitleActionText = $text;
 278         }
 279
 280         function getPageTitleActionText () {
 281                 if ( isset( $this->mPageTitleActionText ) ) {
 282                         return $this->mPageTitleActionText;
 283                 }
 284         }
 285
 286         /**
 287          * Set the robot policy for the page: <http://www.robotstxt.org/meta.html>
 288          *
 289          * @param $policy string The literal string to output as the contents of
 290          *   the meta tag.  Will be parsed according to the spec and output in
 291          *   standardized form.
 292          * @return null
 293          */
 294         public function setRobotPolicy( $policy ) {
 295                 $policy = Article::formatRobotPolicy( $policy );
 296
 297                 if( isset( $policy['index'] ) ){
 298                         $this->setIndexPolicy( $policy['index'] );
 299                 }
 300                 if( isset( $policy['follow'] ) ){
 301                         $this->setFollowPolicy( $policy['follow'] );
 302                 }
 303         }
 304
 305         /**
 306          * Set the index policy for the page, but leave the follow policy un-
 307          * touched.
 308          *
 309          * @param $policy string Either 'index' or 'noindex'.
 310          * @return null
 311          */
 312         public function setIndexPolicy( $policy ) {
 313                 $policy = trim( $policy );
 314                 if( in_array( $policy, array( 'index', 'noindex' ) ) ) {
 315                         $this->mIndexPolicy = $policy;
 316                 }
 317         }
 318
 319         /**
 320          * Set the follow policy for the page, but leave the index policy un-
 321          * touched.
 322          *
 323          * @param $policy string Either 'follow' or 'nofollow'.
 324          * @return null
 325          */
 326         public function setFollowPolicy( $policy ) {
 327                 $policy = trim( $policy );
 328                 if( in_array( $policy, array( 'follow', 'nofollow' ) ) ) {
 329                         $this->mFollowPolicy = $policy;
 330                 }
 331         }
 332
 333         /**
 334          * "HTML title" means the contents of <title>. It is stored as plain, unescaped text and will be run through htmlspecialchars in the skin file.
 335          */
 336         public function setHTMLTitle( $name ) {
 337                 $this->mHTMLtitle = $name;
 338         }
 339
 340         /**
 341          * "Page title" means the contents of <h1>. It is stored as a valid HTML fragment.
 342          * This function allows good tags like <sup> in the <h1> tag, but not bad tags like <script>.
 343          * This function automatically sets <title> to the same content as <h1> but with all tags removed.
 344          * Bad tags that were escaped in <h1> will still be escaped in <title>, and good tags like <i> will be dropped entirely.
 345          */
 346         public function setPageTitle( $name ) {
 347                 # change "<script>foo&bar</script>" to "&lt;script&gt;foo&amp;bar&lt;/script&gt;"
 348                 # but leave "<i>foobar</i>" alone
 349                 $nameWithTags = Sanitizer::normalizeCharReferences( Sanitizer::removeHTMLtags( $name ) );
 350                 $this->mPagetitle = $nameWithTags;
 351
 352                 $taction =  $this->getPageTitleActionText();
 353                 if( !empty( $taction ) ) {
 354                         $name .= ' - '.$taction;
 355                 }
 356
 357                 # change "<i>foo&amp;bar</i>" to "foo&bar"
 358                 $this->setHTMLTitle( wfMsg( 'pagetitle', Sanitizer::stripAllTags( $nameWithTags ) ) );
 359         }
 360
 361         public function setTitle( $t ) {
 362                 $this->mTitle = $t;
 363         }
 364
 365         public function getTitle() {
 366                 if ( $this->mTitle instanceof Title ) {
 367                         return $this->mTitle;
 368                 }
 369                 else {
 370                         wfDebug( __METHOD__ . ' called and $mTitle is null. Return $wgTitle for sanity' );
 371                         global $wgTitle;
 372                         return $wgTitle;
 373                 }
 374         }
 375
 376         public function getHTMLTitle() { return $this->mHTMLtitle; }
 377         public function getPageTitle() { return $this->mPagetitle; }
 378         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 379         public function appendSubtitle( $str ) { $this->mSubtitle .= /*$this->parse(*/$str/*)*/; } // @bug 2514
 380         public function getSubtitle() { return $this->mSubtitle; }
 381         public function isArticle() { return $this->mIsarticle; }
 382         public function setPrintable() { $this->mPrintable = true; }
 383         public function isPrintable() { return $this->mPrintable; }
 384         public function disable() { $this->mDoNothing = true; }
 385         public function isDisabled() { return $this->mDoNothing; }
 386
 387         /**
 388          * Add or remove feed links in the page header
 389          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 390          * for the new version
 391          * @see addFeedLink()
 392          *
 393          * @param $show Boolean: true: add default feeds, false: remove all feeds
 394          */
 395         public function setSyndicated( $show = true ) {
 396                 if ( $show ) {
 397                         $this->setFeedAppendQuery( false );
 398                 } else {
 399                         $this->mFeedLinks = array();
 400                 }
 401         }
 402
 403         /**
 404          * Add default feeds to the page header
 405          * This is mainly kept for backward compatibility, see OutputPage::addFeedLink()
 406          * for the new version
 407          * @see addFeedLink()
 408          *
 409          * @param $val String: query to append to feed links or false to output
 410          *        default links
 411          */
 412         public function setFeedAppendQuery( $val ) {
 413                 global $wgAdvertisedFeedTypes;
 414
 415                 $this->mFeedLinks = array();
 416
 417                 foreach ( $wgAdvertisedFeedTypes as $type ) {
 418                         $query = "feed=$type";
 419                         if ( is_string( $val ) ) {
 420                                 $query .= '&' . $val;
 421                         }
 422                         $this->mFeedLinks[$type] = $this->getTitle()->getLocalURL( $query );
 423                 }
 424         }
 425
 426         /**
 427          * Add a feed link to the page header
 428          *
 429          * @param $format String: feed type, should be a key of $wgFeedClasses
 430          * @param $href String: URL
 431          */
 432         public function addFeedLink( $format, $href ) {
 433                 $this->mFeedLinks[$format] = $href;
 434         }
 435
 436         /**
 437          * Should we output feed links for this page?
 438          * @return Boolean
 439          */
 440         public function isSyndicated() { return count($this->mFeedLinks) > 0; }
 441
 442         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 443
 444         public function setArticleRelated( $v ) {
 445                 $this->mIsArticleRelated = $v;
 446                 if ( !$v ) {
 447                         $this->mIsarticle = false;
 448                 }
 449         }
 450         public function setArticleFlag( $v ) {
 451                 $this->mIsarticle = $v;
 452                 if ( $v ) {
 453                         $this->mIsArticleRelated = $v;
 454                 }
 455         }
 456
 457         public function isArticleRelated() { return $this->mIsArticleRelated; }
 458
 459         public function getLanguageLinks() { return $this->mLanguageLinks; }
 460         public function addLanguageLinks($newLinkArray) {
 461                 $this->mLanguageLinks += $newLinkArray;
 462         }
 463         public function setLanguageLinks($newLinkArray) {
 464                 $this->mLanguageLinks = $newLinkArray;
 465         }
 466
 467         public function getCategoryLinks() {
 468                 return $this->mCategoryLinks;
 469         }
 470
 471         public function getCategories() {
 472                 return $this->mCategories;
 473         }
 474
 475         /**
 476          * Add an array of categories, with names in the keys
 477          */
 478         public function addCategoryLinks( $categories ) {
 479                 global $wgUser, $wgContLang;
 480
 481                 if ( !is_array( $categories ) || count( $categories ) == 0 ) {
 482                         return;
 483                 }
 484
 485                 # Add the links to a LinkBatch
 486                 $arr = array( NS_CATEGORY => $categories );
 487                 $lb = new LinkBatch;
 488                 $lb->setArray( $arr );
 489
 490                 # Fetch existence plus the hiddencat property
 491                 $dbr = wfGetDB( DB_SLAVE );
 492                 $pageTable = $dbr->tableName( 'page' );
 493                 $where = $lb->constructSet( 'page', $dbr );
 494                 $propsTable = $dbr->tableName( 'page_props' );
 495                 $sql = "SELECT page_id, page_namespace, page_title, page_len, page_is_redirect, pp_value
 496                         FROM $pageTable LEFT JOIN $propsTable ON pp_propname='hiddencat' AND pp_page=page_id WHERE $where";
 497                 $res = $dbr->query( $sql, __METHOD__ );
 498
 499                 # Add the results to the link cache
 500                 $lb->addResultToCache( LinkCache::singleton(), $res );
 501
 502                 # Set all the values to 'normal'. This can be done with array_fill_keys in PHP 5.2.0+
 503                 $categories = array_combine( array_keys( $categories ),
 504                         array_fill( 0, count( $categories ), 'normal' ) );
 505
 506                 # Mark hidden categories
 507                 foreach ( $res as $row ) {
 508                         if ( isset( $row->pp_value ) ) {
 509                                 $categories[$row->page_title] = 'hidden';
 510                         }
 511                 }
 512
 513                 # Add the remaining categories to the skin
 514                 if ( wfRunHooks( 'OutputPageMakeCategoryLinks', array( &$this, $categories, &$this->mCategoryLinks ) ) ) {
 515                         $sk = $wgUser->getSkin();
 516                         foreach ( $categories as $category => $type ) {
 517                                 $origcategory = $category;
 518                                 $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 519                                 $wgContLang->findVariantLink( $category, $title, true );
 520                                 if ( $category != $origcategory )
 521                                         if ( array_key_exists( $category, $categories ) )
 522                                                 continue;
 523                                 $text = $wgContLang->convertHtml( $title->getText() );
 524                                 $this->mCategories[] = $title->getText();
 525                                 $this->mCategoryLinks[$type][] = $sk->link( $title, $text );
 526                         }
 527                 }
 528         }
 529
 530         public function setCategoryLinks($categories) {
 531                 $this->mCategoryLinks = array();
 532                 $this->addCategoryLinks($categories);
 533         }
 534
 535         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 536         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 537
 538         public function disallowUserJs() { $this->mAllowUserJs = false; }
 539         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 540
 541         public function prependHTML( $text ) { $this->mBodytext = $text . $this->mBodytext; }
 542         public function addHTML( $text ) { $this->mBodytext .= $text; }
 543         public function clearHTML() { $this->mBodytext = ''; }
 544         public function getHTML() { return $this->mBodytext; }
 545         public function debug( $text ) { $this->mDebugtext .= $text; }
 546
 547         /* @deprecated */
 548         public function setParserOptions( $options ) {
 549                 wfDeprecated( __METHOD__ );
 550                 return $this->parserOptions( $options );
 551         }
 552
 553         public function parserOptions( $options = null ) {
 554                 if ( !$this->mParserOptions ) {
 555                         $this->mParserOptions = new ParserOptions;
 556                 }
 557                 return wfSetVar( $this->mParserOptions, $options );
 558         }
 559
 560         /**
 561          * Set the revision ID which will be seen by the wiki text parser
 562          * for things such as embedded {{REVISIONID}} variable use.
 563          * @param mixed $revid an integer, or NULL
 564          * @return mixed previous value
 565          */
 566         public function setRevisionId( $revid ) {
 567                 $val = is_null( $revid ) ? null : intval( $revid );
 568                 return wfSetVar( $this->mRevisionId, $val );
 569         }
 570
 571         public function getRevisionId() {
 572                 return $this->mRevisionId;
 573         }
 574
 575         /**
 576          * Convert wikitext to HTML and add it to the buffer
 577          * Default assumes that the current page title will
 578          * be used.
 579          *
 580          * @param string $text
 581          * @param bool   $linestart
 582          */
 583         public function addWikiText( $text, $linestart = true ) {
 584                 $title = $this->getTitle(); // Work arround E_STRICT
 585                 $this->addWikiTextTitle( $text, $title, $linestart );
 586         }
 587
 588         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 589                 $this->addWikiTextTitle($text, $title, $linestart);
 590         }
 591
 592         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 593                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 594         }
 595
 596         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 597                 global $wgParser;
 598
 599                 wfProfileIn( __METHOD__ );
 600
 601                 wfIncrStats( 'pcache_not_possible' );
 602
 603                 $popts = $this->parserOptions();
 604                 $oldTidy = $popts->setTidy( $tidy );
 605
 606                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 607                         $linestart, true, $this->mRevisionId );
 608
 609                 $popts->setTidy( $oldTidy );
 610
 611                 $this->addParserOutput( $parserOutput );
 612
 613                 wfProfileOut( __METHOD__ );
 614         }
 615
 616         /**
 617          * @todo document
 618          * @param ParserOutput object &$parserOutput
 619          */
 620         public function addParserOutputNoText( &$parserOutput ) {
 621                 global $wgExemptFromUserRobotsControl, $wgContentNamespaces;
 622
 623                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 624                 $this->addCategoryLinks( $parserOutput->getCategories() );
 625                 $this->mNewSectionLink = $parserOutput->getNewSection();
 626                 $this->mHideNewSectionLink = $parserOutput->getHideNewSection();
 627
 628                 $this->mParseWarnings = $parserOutput->getWarnings();
 629                 if ( $parserOutput->getCacheTime() == -1 ) {
 630                         $this->enableClientCache( false );
 631                 }
 632                 $this->mNoGallery = $parserOutput->getNoGallery();
 633                 $this->mHeadItems = array_merge( $this->mHeadItems, $parserOutput->getHeadItems() );
 634                 // Versioning...
 635                 foreach ( (array)$parserOutput->mTemplateIds as $ns => $dbks ) {
 636                         if ( isset( $this->mTemplateIds[$ns] ) ) {
 637                                 $this->mTemplateIds[$ns] = $dbks + $this->mTemplateIds[$ns];
 638                         } else {
 639                                 $this->mTemplateIds[$ns] = $dbks;
 640                         }
 641                 }
 642                 // Page title
 643                 $title = $parserOutput->getTitleText();
 644                 if ( $title != '' ) {
 645                         $this->setPageTitle( $title );
 646                 }
 647
 648                 // Hooks registered in the object
 649                 global $wgParserOutputHooks;
 650                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 651                         list( $hookName, $data ) = $hookInfo;
 652                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 653                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 654                         }
 655                 }
 656
 657                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 658         }
 659
 660         /**
 661          * @todo document
 662          * @param ParserOutput &$parserOutput
 663          */
 664         function addParserOutput( &$parserOutput ) {
 665                 $this->addParserOutputNoText( $parserOutput );
 666                 $text = $parserOutput->getText();
 667                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 668                 $this->addHTML( $text );
 669         }
 670
 671         /**
 672          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 673          * Saves the text into the parser cache if possible.
 674          *
 675          * @param string  $text
 676          * @param Article $article
 677          * @param bool    $cache
 678          * @deprecated Use Article::outputWikitext
 679          */
 680         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 681                 global $wgParser;
 682
 683                 wfDeprecated( __METHOD__ );
 684
 685                 $popts = $this->parserOptions();
 686                 $popts->setTidy(true);
 687                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 688                         $popts, true, true, $this->mRevisionId );
 689                 $popts->setTidy(false);
 690                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 691                         $parserCache = ParserCache::singleton();
 692                         $parserCache->save( $parserOutput, $article, $popts);
 693                 }
 694
 695                 $this->addParserOutput( $parserOutput );
 696         }
 697
 698         /**
 699          * @deprecated use addWikiTextTidy()
 700          */
 701         public function addSecondaryWikiText( $text, $linestart = true ) {
 702                 wfDeprecated( __METHOD__ );
 703                 $this->addWikiTextTitleTidy($text, $this->getTitle(), $linestart);
 704         }
 705
 706         /**
 707          * Add wikitext with tidy enabled
 708          */
 709         public function addWikiTextTidy(  $text, $linestart = true ) {
 710                 $title = $this->getTitle();
 711                 $this->addWikiTextTitleTidy($text, $title, $linestart);
 712         }
 713
 714
 715         /**
 716          * Add the output of a QuickTemplate to the output buffer
 717          *
 718          * @param QuickTemplate $template
 719          */
 720         public function addTemplate( &$template ) {
 721                 ob_start();
 722                 $template->execute();
 723                 $this->addHTML( ob_get_contents() );
 724                 ob_end_clean();
 725         }
 726
 727         /**
 728          * Parse wikitext and return the HTML.
 729          *
 730          * @param string $text
 731          * @param bool   $linestart Is this the start of a line?
 732          * @param bool   $interface ??
 733          */
 734         public function parse( $text, $linestart = true, $interface = false ) {
 735                 global $wgParser;
 736                 if( is_null( $this->getTitle() ) ) {
 737                         throw new MWException( 'Empty $mTitle in ' . __METHOD__ );
 738                 }
 739                 $popts = $this->parserOptions();
 740                 if ( $interface) { $popts->setInterfaceMessage(true); }
 741                 $parserOutput = $wgParser->parse( $text, $this->getTitle(), $popts,
 742                         $linestart, true, $this->mRevisionId );
 743                 if ( $interface) { $popts->setInterfaceMessage(false); }
 744                 return $parserOutput->getText();
 745         }
 746
 747         /** Parse wikitext, strip paragraphs, and return the HTML. */
 748         public function parseInline( $text, $linestart = true, $interface = false ) {
 749                 $parsed = $this->parse( $text, $linestart, $interface );
 750
 751                 $m = array();
 752                 if ( preg_match( '/^<p>(.*)\n?<\/p>\n?/sU', $parsed, $m ) ) {
 753                         $parsed = $m[1];
 754                 }
 755
 756                 return $parsed;
 757         }
 758
 759         /**
 760          * @param Article $article
 761          * @param User    $user
 762          *
 763          * @deprecated
 764          *
 765          * @return bool True if successful, else false.
 766          */
 767         public function tryParserCache( &$article ) {
 768                 wfDeprecated( __METHOD__ );
 769                 $parserOutput = ParserCache::singleton()->get( $article, $article->getParserOptions() );
 770
 771                 if ($parserOutput !== false) {
 772                         $this->addParserOutput( $parserOutput );
 773                         return true;
 774                 } else {
 775                         return false;
 776                 }
 777         }
 778
 779         /**
 780          * @param int $maxage Maximum cache time on the Squid, in seconds.
 781          */
 782         public function setSquidMaxage( $maxage ) {
 783                 $this->mSquidMaxage = $maxage;
 784         }
 785
 786         /**
 787          * Use enableClientCache(false) to force it to send nocache headers
 788          * @param $state ??
 789          */
 790         public function enableClientCache( $state ) {
 791                 return wfSetVar( $this->mEnableClientCache, $state );
 792         }
 793
 794         function getCacheVaryCookies() {
 795                 global $wgCookiePrefix, $wgCacheVaryCookies;
 796                 static $cookies;
 797                 if ( $cookies === null ) {
 798                         $cookies = array_merge(
 799                                 array(
 800                                         "{$wgCookiePrefix}Token",
 801                                         "{$wgCookiePrefix}LoggedOut",
 802                                         session_name()
 803                                 ),
 804                                 $wgCacheVaryCookies
 805                         );
 806                         wfRunHooks('GetCacheVaryCookies', array( $this, &$cookies ) );
 807                 }
 808                 return $cookies;
 809         }
 810
 811         function uncacheableBecauseRequestVars() {
 812                 global $wgRequest;
 813                 return  $wgRequest->getText('useskin', false) === false
 814                         && $wgRequest->getText('uselang', false) === false;
 815         }
 816
 817         /**
 818          * Check if the request has a cache-varying cookie header
 819          * If it does, it's very important that we don't allow public caching
 820          */
 821         function haveCacheVaryCookies() {
 822                 global $wgRequest;
 823                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 824                 if ( $cookieHeader === false ) {
 825                         return false;
 826                 }
 827                 $cvCookies = $this->getCacheVaryCookies();
 828                 foreach ( $cvCookies as $cookieName ) {
 829                         # Check for a simple string match, like the way squid does it
 830                         if ( strpos( $cookieHeader, $cookieName ) ) {
 831                                 wfDebug( __METHOD__.": found $cookieName\n" );
 832                                 return true;
 833                         }
 834                 }
 835                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 836                 return false;
 837         }
 838
 839         public function addVaryHeader( $header, $option = null ) {
 840                 if ( !array_key_exists( $header, $this->mVaryHeader ) ) {
 841                         $this->mVaryHeader[$header] = $option;
 842                 }
 843                 elseif( is_array( $option ) ) {
 844                         if( is_array( $this->mVaryHeader[$header] ) ) {
 845                                 $this->mVaryHeader[$header] = array_merge( $this->mVaryHeader[$header], $option );
 846                         }
 847                         else {
 848                                 $this->mVaryHeader[$header] = $option;
 849                         }
 850                 }
 851                 $this->mVaryHeader[$header] = array_unique( $this->mVaryHeader[$header] );
 852         }
 853
 854         /** Get a complete X-Vary-Options header */
 855         public function getXVO() {
 856                 $cvCookies = $this->getCacheVaryCookies();
 857
 858                 $cookiesOption = array();
 859                 foreach ( $cvCookies as $cookieName ) {
 860                         $cookiesOption[] = 'string-contains=' . $cookieName;
 861                 }
 862                 $this->addVaryHeader( 'Cookie', $cookiesOption );
 863
 864                 $headers = array();
 865                 foreach( $this->mVaryHeader as $header => $option ) {
 866                         $newheader = $header;
 867                         if( is_array( $option ) )
 868                                 $newheader .= ';' . implode( ';', $option );
 869                         $headers[] = $newheader;
 870                 }
 871                 $xvo = 'X-Vary-Options: ' . implode( ',', $headers );
 872
 873                 return $xvo;
 874         }
 875
 876         /** bug 21672: Add Accept-Language to Vary and XVO headers
 877                 if there's no 'variant' parameter existed in GET.
 878
 879                 For example:
 880                  /w/index.php?title=Main_page should always be served; but
 881                  /w/index.php?title=Main_page&variant=zh-cn should never be served.
 882
 883                 patched by Liangent and Philip */
 884         function addAcceptLanguage() {
 885                 global $wgRequest, $wgContLang;
 886                 if( !$wgRequest->getCheck('variant') && $wgContLang->hasVariants() ) {
 887                         $variants = $wgContLang->getVariants();
 888                         $aloption = array();
 889                         foreach ( $variants as $variant ) {
 890                                 if( $variant === $wgContLang->getCode() )
 891                                         continue;
 892                                 else
 893                                         $aloption[] = "string-contains=$variant";
 894                         }
 895                         $this->addVaryHeader( 'Accept-Language', $aloption );
 896                 }
 897         }
 898
 899         public function sendCacheControl() {
 900                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest, $wgUseXVO;
 901
 902                 $response = $wgRequest->response();
 903                 if ($wgUseETag && $this->mETag)
 904                         $response->header("ETag: $this->mETag");
 905
 906                 $this->addAcceptLanguage();
 907
 908                 # don't serve compressed data to clients who can't handle it
 909                 # maintain different caches for logged-in users and non-logged in ones
 910                 $response->header( 'Vary: ' . join( ', ', array_keys( $this->mVaryHeader ) ) );
 911
 912                 if ( $wgUseXVO ) {
 913                         # Add an X-Vary-Options header for Squid with Wikimedia patches
 914                         $response->header( $this->getXVO() );
 915                 }
 916
 917                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 918                         if( $wgUseSquid && session_id() == '' &&
 919                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 920                         {
 921                                 if ( $wgUseESI ) {
 922                                         # We'll purge the proxy cache explicitly, but require end user agents
 923                                         # to revalidate against the proxy on each visit.
 924                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 925                                         wfDebug( __METHOD__ . ": proxy caching with ESI; {$this->mLastModified} **\n", false );
 926                                         # start with a shorter timeout for initial testing
 927                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 928                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 929                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 930                                 } else {
 931                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 932                                         # to revalidate against the proxy on each visit.
 933                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 934                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 935                                         wfDebug( __METHOD__ . ": local proxy caching; {$this->mLastModified} **\n", false );
 936                                         # start with a shorter timeout for initial testing
 937                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 938                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 939                                 }
 940                         } else {
 941                                 # We do want clients to cache if they can, but they *must* check for updates
 942                                 # on revisiting the page.
 943                                 wfDebug( __METHOD__ . ": private caching; {$this->mLastModified} **\n", false );
 944                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 945                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 946                         }
 947                         if($this->mLastModified) {
 948                                 $response->header( "Last-Modified: {$this->mLastModified}" );
 949                         }
 950                 } else {
 951                         wfDebug( __METHOD__ . ": no caching **\n", false );
 952
 953                         # In general, the absence of a last modified header should be enough to prevent
 954                         # the client from using its cache. We send a few other things just to make sure.
 955                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 956                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 957                         $response->header( 'Pragma: no-cache' );
 958                 }
 959                 wfRunHooks('CacheHeadersAfterSet', array( $this ) );
 960         }
 961
 962         /**
 963          * Get the message associed with the HTTP response code $code
 964          *
 965          * @param $code Integer: status code
 966          * @return String or null: message or null if $code is not in the list of
 967          *         messages
 968          */
 969         public static function getStatusMessage( $code ) {
 970                 static $statusMessage = array(
 971                         100 => 'Continue',
 972                         101 => 'Switching Protocols',
 973                         102 => 'Processing',
 974                         200 => 'OK',
 975                         201 => 'Created',
 976                         202 => 'Accepted',
 977                         203 => 'Non-Authoritative Information',
 978                         204 => 'No Content',
 979                         205 => 'Reset Content',
 980                         206 => 'Partial Content',
 981                         207 => 'Multi-Status',
 982                         300 => 'Multiple Choices',
 983                         301 => 'Moved Permanently',
 984                         302 => 'Found',
 985                         303 => 'See Other',
 986                         304 => 'Not Modified',
 987                         305 => 'Use Proxy',
 988                         307 => 'Temporary Redirect',
 989                         400 => 'Bad Request',
 990                         401 => 'Unauthorized',
 991                         402 => 'Payment Required',
 992                         403 => 'Forbidden',
 993                         404 => 'Not Found',
 994                         405 => 'Method Not Allowed',
 995                         406 => 'Not Acceptable',
 996                         407 => 'Proxy Authentication Required',
 997                         408 => 'Request Timeout',
 998                         409 => 'Conflict',
 999                         410 => 'Gone',
1000                         411 => 'Length Required',
1001                         412 => 'Precondition Failed',
1002                         413 => 'Request Entity Too Large',
1003                         414 => 'Request-URI Too Large',
1004                         415 => 'Unsupported Media Type',
1005                         416 => 'Request Range Not Satisfiable',
1006                         417 => 'Expectation Failed',
1007                         422 => 'Unprocessable Entity',
1008                         423 => 'Locked',
1009                         424 => 'Failed Dependency',
1010                         500 => 'Internal Server Error',
1011                         501 => 'Not Implemented',
1012                         502 => 'Bad Gateway',
1013                         503 => 'Service Unavailable',
1014                         504 => 'Gateway Timeout',
1015                         505 => 'HTTP Version Not Supported',
1016                         507 => 'Insufficient Storage'
1017                 );
1018                 return isset( $statusMessage[$code] ) ? $statusMessage[$code] : null;
1019         }
1020
1021         /**
1022          * Finally, all the text has been munged and accumulated into
1023          * the object, let's actually output it:
1024          */
1025         public function output() {
1026                 global $wgUser, $wgOutputEncoding, $wgRequest;
1027                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
1028                 global $wgUseAjax, $wgAjaxWatch;
1029                 global $wgEnableMWSuggest, $wgUniversalEditButton;
1030                 global $wgArticle;
1031
1032                 if( $this->mDoNothing ){
1033                         return;
1034                 }
1035                 wfProfileIn( __METHOD__ );
1036                 if ( $this->mRedirect != '' ) {
1037                         # Standards require redirect URLs to be absolute
1038                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
1039                         if( $this->mRedirectCode == '301' || $this->mRedirectCode == '303' ) {
1040                                 if( !$wgDebugRedirects ) {
1041                                         $message = self::getStatusMessage( $this->mRedirectCode );
1042                                         $wgRequest->response()->header( "HTTP/1.1 {$this->mRedirectCode} $message" );
1043                                 }
1044                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
1045                         }
1046                         $this->sendCacheControl();
1047
1048                         $wgRequest->response()->header( "Content-Type: text/html; charset=utf-8" );
1049                         if( $wgDebugRedirects ) {
1050                                 $url = htmlspecialchars( $this->mRedirect );
1051                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
1052                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
1053                                 print "</body>\n</html>\n";
1054                         } else {
1055                                 $wgRequest->response()->header( 'Location: ' . $this->mRedirect );
1056                         }
1057                         wfProfileOut( __METHOD__ );
1058                         return;
1059                 } elseif ( $this->mStatusCode ) {
1060                         $message = self::getStatusMessage( $this->mStatusCode );
1061                         if ( $message )
1062                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $message );
1063                 }
1064
1065                 $sk = $wgUser->getSkin();
1066
1067                 if ( $wgUseAjax ) {
1068                         $this->addScriptFile( 'ajax.js' );
1069
1070                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
1071
1072                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
1073                                 $this->addScriptFile( 'ajaxwatch.js' );
1074                         }
1075
1076                         if ( $wgEnableMWSuggest && !$wgUser->getOption( 'disablesuggest', false ) ){
1077                                 $this->addScriptFile( 'mwsuggest.js' );
1078                         }
1079                 }
1080
1081                 if( $wgUser->getBoolOption( 'editsectiononrightclick' ) ) {
1082                         $this->addScriptFile( 'rightclickedit.js' );
1083                 }
1084
1085                 if( $wgUniversalEditButton ) {
1086                         if( isset( $wgArticle ) && $this->getTitle() && $this->getTitle()->quickUserCan( 'edit' )
1087                                 && ( $this->getTitle()->exists() || $this->getTitle()->quickUserCan( 'create' ) ) ) {
1088                                 // Original UniversalEditButton
1089                                 $msg = wfMsg('edit');
1090                                 $this->addLink( array(
1091                                         'rel' => 'alternate',
1092                                         'type' => 'application/x-wiki',
1093                                         'title' => $msg,
1094                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1095                                 ) );
1096                                 // Alternate edit link
1097                                 $this->addLink( array(
1098                                         'rel' => 'edit',
1099                                         'title' => $msg,
1100                                         'href' => $this->getTitle()->getLocalURL( 'action=edit' )
1101                                 ) );
1102                         }
1103                 }
1104
1105                 # Buffer output; final headers may depend on later processing
1106                 ob_start();
1107
1108                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
1109                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
1110
1111                 if ($this->mArticleBodyOnly) {
1112                         $this->out($this->mBodytext);
1113                 } else {
1114                         // Hook that allows last minute changes to the output page, e.g.
1115                         // adding of CSS or Javascript by extensions.
1116                         wfRunHooks( 'BeforePageDisplay', array( &$this, &$sk ) );
1117
1118                         wfProfileIn( 'Output-skin' );
1119                         $sk->outputPage( $this );
1120                         wfProfileOut( 'Output-skin' );
1121                 }
1122
1123                 $this->sendCacheControl();
1124                 ob_end_flush();
1125                 wfProfileOut( __METHOD__ );
1126         }
1127
1128         /**
1129          * Actually output something with print(). Performs an iconv to the
1130          * output encoding, if needed.
1131          * @param string $ins The string to output
1132          */
1133         public function out( $ins ) {
1134                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
1135                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
1136                         $outs = $ins;
1137                 } else {
1138                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
1139                         if ( false === $outs ) { $outs = $ins; }
1140                 }
1141                 print $outs;
1142         }
1143
1144         /**
1145          * @todo document
1146          */
1147         public static function setEncodings() {
1148                 global $wgInputEncoding, $wgOutputEncoding;
1149                 global $wgContLang;
1150
1151                 $wgInputEncoding = strtolower( $wgInputEncoding );
1152
1153                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
1154                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
1155                         return;
1156                 }
1157                 $wgOutputEncoding = $wgInputEncoding;
1158         }
1159
1160         /**
1161          * Deprecated, use wfReportTime() instead.
1162          * @return string
1163          * @deprecated
1164          */
1165         public function reportTime() {
1166                 wfDeprecated( __METHOD__ );
1167                 $time = wfReportTime();
1168                 return $time;
1169         }
1170
1171         /**
1172          * Produce a "user is blocked" page.
1173          *
1174          * @param bool $return Whether to have a "return to $wgTitle" message or not.
1175          * @return nothing
1176          */
1177         function blockedPage( $return = true ) {
1178                 global $wgUser, $wgContLang, $wgLang;
1179
1180                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
1181                 $this->setRobotPolicy( 'noindex,nofollow' );
1182                 $this->setArticleRelated( false );
1183
1184                 $name = User::whoIs( $wgUser->blockedBy() );
1185                 $reason = $wgUser->blockedFor();
1186                 if( $reason == '' ) {
1187                         $reason = wfMsg( 'blockednoreason' );
1188                 }
1189                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
1190                 $ip = wfGetIP();
1191
1192                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
1193
1194                 $blockid = $wgUser->mBlock->mId;
1195
1196                 $blockExpiry = $wgUser->mBlock->mExpiry;
1197                 if ( $blockExpiry == 'infinity' ) {
1198                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
1199                         // Search for localization in 'ipboptions'
1200                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
1201                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
1202                                 if ( strpos( $option, ":" ) === false )
1203                                         continue;
1204                                 list( $show, $value ) = explode( ":", $option );
1205                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
1206                                         $blockExpiry = $show;
1207                                         break;
1208                                 }
1209                         }
1210                 } else {
1211                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
1212                 }
1213
1214                 if ( $wgUser->mBlock->mAuto ) {
1215                         $msg = 'autoblockedtext';
1216                 } else {
1217                         $msg = 'blockedtext';
1218                 }
1219
1220                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
1221                  * This could be a username, an ip range, or a single ip. */
1222                 $intended = $wgUser->mBlock->mAddress;
1223
1224                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
1225
1226                 # Don't auto-return to special pages
1227                 if( $return ) {
1228                         $return = $this->getTitle()->getNamespace() > -1 ? $this->getTitle() : null;
1229                         $this->returnToMain( null, $return );
1230                 }
1231         }
1232
1233         /**
1234          * Output a standard error page
1235          *
1236          * @param string $title Message key for page title
1237          * @param string $msg Message key for page text
1238          * @param array $params Message parameters
1239          */
1240         public function showErrorPage( $title, $msg, $params = array() ) {
1241                 if ( $this->getTitle() ) {
1242                         $this->mDebugtext .= 'Original title: ' . $this->getTitle()->getPrefixedText() . "\n";
1243                 }
1244                 $this->setPageTitle( wfMsg( $title ) );
1245                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1246                 $this->setRobotPolicy( 'noindex,nofollow' );
1247                 $this->setArticleRelated( false );
1248                 $this->enableClientCache( false );
1249                 $this->mRedirect = '';
1250                 $this->mBodytext = '';
1251
1252                 array_unshift( $params, 'parse' );
1253                 array_unshift( $params, $msg );
1254                 $this->addHTML( call_user_func_array( 'wfMsgExt', $params ) );
1255
1256                 $this->returnToMain();
1257         }
1258
1259         /**
1260          * Output a standard permission error page
1261          *
1262          * @param array $errors Error message keys
1263          */
1264         public function showPermissionsErrorPage( $errors, $action = null )
1265         {
1266                 $this->mDebugtext .= 'Original title: ' .
1267                 $this->getTitle()->getPrefixedText() . "\n";
1268                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
1269                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
1270                 $this->setRobotPolicy( 'noindex,nofollow' );
1271                 $this->setArticleRelated( false );
1272                 $this->enableClientCache( false );
1273                 $this->mRedirect = '';
1274                 $this->mBodytext = '';
1275                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors, $action ) );
1276         }
1277
1278         /** @deprecated */
1279         public function errorpage( $title, $msg ) {
1280                 wfDeprecated( __METHOD__ );
1281                 throw new ErrorPageError( $title, $msg );
1282         }
1283
1284         /**
1285          * Display an error page indicating that a given version of MediaWiki is
1286          * required to use it
1287          *
1288          * @param mixed $version The version of MediaWiki needed to use the page
1289          */
1290         public function versionRequired( $version ) {
1291                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
1292                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
1293                 $this->setRobotPolicy( 'noindex,nofollow' );
1294                 $this->setArticleRelated( false );
1295                 $this->mBodytext = '';
1296
1297                 $this->addWikiMsg( 'versionrequiredtext', $version );
1298                 $this->returnToMain();
1299         }
1300
1301         /**
1302          * Display an error page noting that a given permission bit is required.
1303          *
1304          * @param string $permission key required
1305          */
1306         public function permissionRequired( $permission ) {
1307                 global $wgLang;
1308
1309                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1310                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
1311                 $this->setRobotPolicy( 'noindex,nofollow' );
1312                 $this->setArticleRelated( false );
1313                 $this->mBodytext = '';
1314
1315                 $groups = array_map( array( 'User', 'makeGroupLinkWiki' ),
1316                         User::getGroupsWithPermission( $permission ) );
1317                 if( $groups ) {
1318                         $this->addWikiMsg( 'badaccess-groups',
1319                                 $wgLang->commaList( $groups ),
1320                                 count( $groups) );
1321                 } else {
1322                         $this->addWikiMsg( 'badaccess-group0' );
1323                 }
1324                 $this->returnToMain();
1325         }
1326
1327         /**
1328          * Use permissionRequired.
1329          * @deprecated
1330          */
1331         public function sysopRequired() {
1332                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
1333         }
1334
1335         /**
1336          * Use permissionRequired.
1337          * @deprecated
1338          */
1339         public function developerRequired() {
1340                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
1341         }
1342
1343         /**
1344          * Produce the stock "please login to use the wiki" page
1345          */
1346         public function loginToUse() {
1347                 global $wgUser, $wgContLang;
1348
1349                 if( $wgUser->isLoggedIn() ) {
1350                         $this->permissionRequired( 'read' );
1351                         return;
1352                 }
1353
1354                 $skin = $wgUser->getSkin();
1355
1356                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1357                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1358                 $this->setRobotPolicy( 'noindex,nofollow' );
1359                 $this->setArticleFlag( false );
1360
1361                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1362                 $loginLink = $skin->link(
1363                         $loginTitle,
1364                         wfMsgHtml( 'loginreqlink' ),
1365                         array(),
1366                         array( 'returnto' => $this->getTitle()->getPrefixedText() ),
1367                         array( 'known', 'noclasses' )
1368                 );
1369                 $this->addHTML( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1370                 $this->addHTML( "\n<!--" . $this->getTitle()->getPrefixedUrl() . "-->" );
1371
1372                 # Don't return to the main page if the user can't read it
1373                 # otherwise we'll end up in a pointless loop
1374                 $mainPage = Title::newMainPage();
1375                 if( $mainPage->userCanRead() )
1376                         $this->returnToMain( null, $mainPage );
1377         }
1378
1379         /** @deprecated */
1380         public function databaseError( $fname, $sql, $error, $errno ) {
1381                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1382         }
1383
1384         /**
1385          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1386          * @return string The wikitext error-messages, formatted into a list.
1387          */
1388         public function formatPermissionsErrorMessage( $errors, $action = null ) {
1389                 if ($action == null) {
1390                         $text = wfMsgNoTrans( 'permissionserrorstext', count($errors)). "\n\n";
1391                 } else {
1392                         global $wgLang;
1393                         $action_desc = wfMsgNoTrans( "action-$action" );
1394                         $text = wfMsgNoTrans( 'permissionserrorstext-withaction', count($errors), $action_desc ) . "\n\n";
1395                 }
1396
1397                 if (count( $errors ) > 1) {
1398                         $text .= '<ul class="permissions-errors">' . "\n";
1399
1400                         foreach( $errors as $error )
1401                         {
1402                                 $text .= '<li>';
1403                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1404                                 $text .= "</li>\n";
1405                         }
1406                         $text .= '</ul>';
1407                 } else {
1408                         $text .= "<div class=\"permissions-errors\">\n" . call_user_func_array( 'wfMsgNoTrans', reset( $errors ) ) . "\n</div>";
1409                 }
1410
1411                 return $text;
1412         }
1413
1414         /**
1415          * Display a page stating that the Wiki is in read-only mode,
1416          * and optionally show the source of the page that the user
1417          * was trying to edit.  Should only be called (for this
1418          * purpose) after wfReadOnly() has returned true.
1419          *
1420          * For historical reasons, this function is _also_ used to
1421          * show the error message when a user tries to edit a page
1422          * they are not allowed to edit.  (Unless it's because they're
1423          * blocked, then we show blockedPage() instead.)  In this
1424          * case, the second parameter should be set to true and a list
1425          * of reasons supplied as the third parameter.
1426          *
1427          * @todo Needs to be split into multiple functions.
1428          *
1429          * @param string $source    Source code to show (or null).
1430          * @param bool   $protected Is this a permissions error?
1431          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1432          */
1433         public function readOnlyPage( $source = null, $protected = false, $reasons = array(), $action = null ) {
1434                 global $wgUser;
1435                 $skin = $wgUser->getSkin();
1436
1437                 $this->setRobotPolicy( 'noindex,nofollow' );
1438                 $this->setArticleRelated( false );
1439
1440                 // If no reason is given, just supply a default "I can't let you do
1441                 // that, Dave" message.  Should only occur if called by legacy code.
1442                 if ( $protected && empty($reasons) ) {
1443                         $reasons[] = array( 'badaccess-group0' );
1444                 }
1445
1446                 if ( !empty($reasons) ) {
1447                         // Permissions error
1448                         if( $source ) {
1449                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1450                                 $this->setSubtitle(
1451                                         wfMsg(
1452                                                 'viewsourcefor',
1453                                                 $skin->link(
1454                                                         $this->getTitle(),
1455                                                         null,
1456                                                         array(),
1457                                                         array(),
1458                                                         array( 'known', 'noclasses' )
1459                                                 )
1460                                         )
1461                                 );
1462                         } else {
1463                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1464                         }
1465                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons, $action ) );
1466                 } else {
1467                         // Wiki is read only
1468                         $this->setPageTitle( wfMsg( 'readonly' ) );
1469                         $reason = wfReadOnlyReason();
1470                         $this->wrapWikiMsg( '<div class="mw-readonly-error">\n$1</div>', array( 'readonlytext', $reason ) );
1471                 }
1472
1473                 // Show source, if supplied
1474                 if( is_string( $source ) ) {
1475                         $this->addWikiMsg( 'viewsourcetext' );
1476
1477                         $params = array(
1478                                 'id'   => 'wpTextbox1',
1479                                 'name' => 'wpTextbox1',
1480                                 'cols' => $wgUser->getOption( 'cols' ),
1481                                 'rows' => $wgUser->getOption( 'rows' ),
1482                                 'readonly' => 'readonly'
1483                         );
1484                         $this->addHTML( Html::element( 'textarea', $params, $source ) );
1485
1486                         // Show templates used by this article
1487                         $skin = $wgUser->getSkin();
1488                         $article = new Article( $this->getTitle() );
1489                         $this->addHTML( "<div class='templatesUsed'>
1490 {$skin->formatTemplates( $article->getUsedTemplates() )}
1491 </div>
1492 " );
1493                 }
1494
1495                 # If the title doesn't exist, it's fairly pointless to print a return
1496                 # link to it.  After all, you just tried editing it and couldn't, so
1497                 # what's there to do there?
1498                 if( $this->getTitle()->exists() ) {
1499                         $this->returnToMain( null, $this->getTitle() );
1500                 }
1501         }
1502
1503         /** @deprecated */
1504         public function fatalError( $message ) {
1505                 wfDeprecated( __METHOD__ );
1506                 throw new FatalError( $message );
1507         }
1508
1509         /** @deprecated */
1510         public function unexpectedValueError( $name, $val ) {
1511                 wfDeprecated( __METHOD__ );
1512                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1513         }
1514
1515         /** @deprecated */
1516         public function fileCopyError( $old, $new ) {
1517                 wfDeprecated( __METHOD__ );
1518                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1519         }
1520
1521         /** @deprecated */
1522         public function fileRenameError( $old, $new ) {
1523                 wfDeprecated( __METHOD__ );
1524                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1525         }
1526
1527         /** @deprecated */
1528         public function fileDeleteError( $name ) {
1529                 wfDeprecated( __METHOD__ );
1530                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1531         }
1532
1533         /** @deprecated */
1534         public function fileNotFoundError( $name ) {
1535                 wfDeprecated( __METHOD__ );
1536                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1537         }
1538
1539         public function showFatalError( $message ) {
1540                 $this->setPageTitle( wfMsg( "internalerror" ) );
1541                 $this->setRobotPolicy( "noindex,nofollow" );
1542                 $this->setArticleRelated( false );
1543                 $this->enableClientCache( false );
1544                 $this->mRedirect = '';
1545                 $this->mBodytext = $message;
1546         }
1547
1548         public function showUnexpectedValueError( $name, $val ) {
1549                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1550         }
1551
1552         public function showFileCopyError( $old, $new ) {
1553                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1554         }
1555
1556         public function showFileRenameError( $old, $new ) {
1557                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1558         }
1559
1560         public function showFileDeleteError( $name ) {
1561                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1562         }
1563
1564         public function showFileNotFoundError( $name ) {
1565                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1566         }
1567
1568         /**
1569          * Add a "return to" link pointing to a specified title
1570          *
1571          * @param $title Title to link
1572          * @param $query String: query string
1573          */
1574         public function addReturnTo( $title, $query = array() ) {
1575                 global $wgUser;
1576                 $this->addLink( array( 'rel' => 'next', 'href' => $title->getFullUrl() ) );
1577                 $link = wfMsgHtml( 'returnto', $wgUser->getSkin()->link(
1578                         $title, null, array(), $query ) );
1579                 $this->addHTML( "<p id=\"mw-returnto\">{$link}</p>\n" );
1580         }
1581
1582         /**
1583          * Add a "return to" link pointing to a specified title,
1584          * or the title indicated in the request, or else the main page
1585          *
1586          * @param $unused No longer used
1587          * @param $returnto Title or String to return to
1588          * @param $returntoquery String: query string for the return to link
1589          */
1590         public function returnToMain( $unused = null, $returnto = null, $returntoquery = null ) {
1591                 global $wgRequest;
1592
1593                 if ( $returnto == null ) {
1594                         $returnto = $wgRequest->getText( 'returnto' );
1595                 }
1596
1597                 if ( $returntoquery == null ) {
1598                         $returntoquery = $wgRequest->getText( 'returntoquery' );
1599                 }
1600
1601                 if ( $returnto === '' ) {
1602                         $returnto = Title::newMainPage();
1603                 }
1604
1605                 if ( is_object( $returnto ) ) {
1606                         $titleObj = $returnto;
1607                 } else {
1608                         $titleObj = Title::newFromText( $returnto );
1609                 }
1610                 if ( !is_object( $titleObj ) ) {
1611                         $titleObj = Title::newMainPage();
1612                 }
1613
1614                 $this->addReturnTo( $titleObj, $returntoquery );
1615         }
1616
1617         /**
1618          * @return string The doctype, opening <html>, and head element.
1619          *
1620          * @param $sk Skin The given Skin
1621          */
1622         public function headElement( Skin $sk, $includeStyle = true ) {
1623                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1624                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces, $wgHtml5Version;
1625                 global $wgContLang, $wgUseTrackbacks, $wgStyleVersion, $wgHtml5, $wgWellFormedXml;
1626                 global $wgUser, $wgRequest, $wgLang;
1627
1628                 $this->addMeta( "http:Content-Type", "$wgMimeType; charset={$wgOutputEncoding}" );
1629                 if ( $sk->commonPrintStylesheet() ) {
1630                         $this->addStyle( 'common/wikiprintable.css', 'print' );
1631                 }
1632                 $sk->setupUserCss( $this );
1633
1634                 $ret = '';
1635
1636                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1637                         $ret .= "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
1638                 }
1639
1640                 if ( $this->getHTMLTitle() == '' ) {
1641                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1642                 }
1643
1644                 $dir = $wgContLang->getDir();
1645
1646                 if ( $wgHtml5 ) {
1647                         if ( $wgWellFormedXml ) {
1648                                 # Unknown elements and attributes are okay in XML, but unknown
1649                                 # named entities are well-formedness errors and will break XML
1650                                 # parsers.  Thus we need a doctype that gives us appropriate
1651                                 # entity definitions.  The HTML5 spec permits four legacy
1652                                 # doctypes as obsolete but conforming, so let's pick one of
1653                                 # those, although it makes our pages look like XHTML1 Strict.
1654                                 # Isn't compatibility great?
1655                                 $ret .= "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n";
1656                         } else {
1657                                 # Much saner.
1658                                 $ret .= "<!doctype html>\n";
1659                         }
1660                         $ret .= "<html lang=\"$wgContLanguageCode\" dir=\"$dir\" ";
1661                         if ( $wgHtml5Version ) $ret .= " version=\"$wgHtml5Version\" ";
1662                         $ret .= ">\n";
1663                 } else {
1664                         $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\" \"$wgDTD\">\n";
1665                         $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1666                         foreach($wgXhtmlNamespaces as $tag => $ns) {
1667                                 $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1668                         }
1669                         $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" dir=\"$dir\">\n";
1670                 }
1671
1672                 $ret .= "<head>\n";
1673                 $ret .= "<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1674                 $ret .= implode( "\n", array(
1675                         $this->getHeadLinks(),
1676                         $this->buildCssLinks(),
1677                         $this->getHeadScripts( $sk ),
1678                         $this->getHeadItems(),
1679                 ));
1680                 if( $sk->usercss ){
1681                         $ret .= Html::inlineStyle( $sk->usercss );
1682                 }
1683
1684                 if ($wgUseTrackbacks && $this->isArticleRelated())
1685                         $ret .= $this->getTitle()->trackbackRDF();
1686
1687                 $ret .= "</head>\n";
1688
1689                 $bodyAttrs = array();
1690
1691                 # Crazy edit-on-double-click stuff
1692                 $action = $wgRequest->getVal( 'action', 'view' );
1693
1694                 if ( $this->getTitle()->getNamespace() != NS_SPECIAL
1695                 && !in_array( $action, array( 'edit', 'submit' ) )
1696                 && $wgUser->getOption( 'editondblclick' ) ) {
1697                         $bodyAttrs['ondblclick'] = "document.location = '" . Xml::escapeJsString( $this->getTitle()->getEditURL() ) . "'";
1698                 }
1699
1700                 # Class bloat
1701                 $bodyAttrs['class'] = "mediawiki $dir";
1702
1703                 if ( $wgLang->capitalizeAllNouns() ) {
1704                         # A <body> class is probably not the best way to do this . . .
1705                         $bodyAttrs['class'] .= ' capitalize-all-nouns';
1706                 }
1707                 $bodyAttrs['class'] .= ' ns-' . $this->getTitle()->getNamespace();
1708                 if ( $this->getTitle()->getNamespace() == NS_SPECIAL ) {
1709                         $bodyAttrs['class'] .= ' ns-special';
1710                 } elseif ( $this->getTitle()->isTalkPage() ) {
1711                         $bodyAttrs['class'] .= ' ns-talk';
1712                 } else {
1713                         $bodyAttrs['class'] .= ' ns-subject';
1714                 }
1715                 $bodyAttrs['class'] .= ' ' . Sanitizer::escapeClass( 'page-' . $this->getTitle()->getPrefixedText() );
1716                 $bodyAttrs['class'] .= ' skin-' . Sanitizer::escapeClass( $wgUser->getSkin()->getSkinName() );
1717
1718                 $ret .= Html::openElement( 'body', $bodyAttrs ) . "\n";
1719
1720                 return $ret;
1721         }
1722
1723         /*
1724          * gets the global variables and mScripts
1725          *
1726          * also adds userjs to the end if enabled:
1727         */
1728         function getHeadScripts( Skin $sk ) {
1729                 global $wgUser, $wgRequest, $wgJsMimeType, $wgUseSiteJs;
1730                 global $wgStylePath, $wgStyleVersion;
1731
1732                 $scripts = Skin::makeGlobalVariablesScript( $sk->getSkinName() );
1733                 $scripts .= Html::linkedScript( "{$wgStylePath}/common/wikibits.js?$wgStyleVersion" );
1734
1735                 //add site JS if enabled:
1736                 if( $wgUseSiteJs ) {
1737                         $jsCache = $wgUser->isLoggedIn() ? '&smaxage=0' : '';
1738                         $this->addScriptFile(  Skin::makeUrl( '-',
1739                                         "action=raw$jsCache&gen=js&useskin=" .
1740                                         urlencode( $sk->getSkinName() )
1741                                         )
1742                                 );
1743                 }
1744
1745                 //add user js if enabled:
1746                 if( $this->isUserJsAllowed() && $wgUser->isLoggedIn() ) {
1747                         $action = $wgRequest->getVal( 'action', 'view' );
1748                         if( $this->mTitle && $this->mTitle->isJsSubpage() and $sk->userCanPreview( $action ) ) {
1749                                 # XXX: additional security check/prompt?
1750                                 $this->addInlineScript( $wgRequest->getText( 'wpTextbox1' ) );
1751                         } else {
1752                                 $userpage = $wgUser->getUserPage();
1753                                 $scriptpage = Title::makeTitleSafe(
1754                                         NS_USER,
1755                                         $userpage->getDBkey() . '/' . $sk->getSkinName() . '.js'
1756                                 );
1757                                 if ( $scriptpage && $scriptpage->exists() ) {
1758                                         $userjs = Skin::makeUrl( $scriptpage->getPrefixedText(), 'action=raw&ctype=' . $wgJsMimeType );
1759                                         $this->addScriptFile( $userjs );
1760                                 }
1761                         }
1762                 }
1763
1764                 $scripts .= "\n" . $this->mScripts;
1765                 return $scripts;
1766         }
1767
1768         protected function addDefaultMeta() {
1769                 global $wgVersion, $wgHtml5;
1770
1771                 static $called = false;
1772                 if ( $called ) {
1773                         # Don't run this twice
1774                         return;
1775                 }
1776                 $called = true;
1777
1778                 if ( !$wgHtml5 ) {
1779                         $this->addMeta( 'http:Content-Style-Type', 'text/css' ); //bug 15835
1780                 }
1781                 $this->addMeta( 'generator', "MediaWiki $wgVersion" );
1782
1783                 $p = "{$this->mIndexPolicy},{$this->mFollowPolicy}";
1784                 if( $p !== 'index,follow' ) {
1785                         // http://www.robotstxt.org/wc/meta-user.html
1786                         // Only show if it's different from the default robots policy
1787                         $this->addMeta( 'robots', $p );
1788                 }
1789
1790                 if ( count( $this->mKeywords ) > 0 ) {
1791                         $strip = array(
1792                                 "/<.*?" . ">/" => '',
1793                                 "/_/" => ' '
1794                         );
1795                         $this->addMeta( 'keywords', preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ) ) );
1796                 }
1797         }
1798
1799         /**
1800          * @return string HTML tag links to be put in the header.
1801          */
1802         public function getHeadLinks() {
1803                 global $wgRequest, $wgFeed;
1804
1805                 // Ideally this should happen earlier, somewhere. :P
1806                 $this->addDefaultMeta();
1807
1808                 $tags = array();
1809
1810                 foreach ( $this->mMetatags as $tag ) {
1811                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1812                                 $a = 'http-equiv';
1813                                 $tag[0] = substr( $tag[0], 5 );
1814                         } else {
1815                                 $a = 'name';
1816                         }
1817                         $tags[] = Html::element( 'meta',
1818                                 array(
1819                                         $a => $tag[0],
1820                                         'content' => $tag[1] ) );
1821                 }
1822                 foreach ( $this->mLinktags as $tag ) {
1823                         $tags[] = Html::element( 'link', $tag );
1824                 }
1825
1826                 if( $wgFeed ) {
1827                         foreach( $this->getSyndicationLinks() as $format => $link ) {
1828                                 # Use the page name for the title (accessed through $wgTitle since
1829                                 # there's no other way).  In principle, this could lead to issues
1830                                 # with having the same name for different feeds corresponding to
1831                                 # the same page, but we can't avoid that at this low a level.
1832
1833                                 $tags[] = $this->feedLink(
1834                                         $format,
1835                                         $link,
1836                                         # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1837                                         wfMsg( "page-{$format}-feed", $this->getTitle()->getPrefixedText() ) );
1838                         }
1839
1840                         # Recent changes feed should appear on every page (except recentchanges,
1841                         # that would be redundant). Put it after the per-page feed to avoid
1842                         # changing existing behavior. It's still available, probably via a
1843                         # menu in your browser. Some sites might have a different feed they'd
1844                         # like to promote instead of the RC feed (maybe like a "Recent New Articles"
1845                         # or "Breaking news" one). For this, we see if $wgOverrideSiteFeed is defined.
1846                         # If so, use it instead.
1847
1848                         global $wgOverrideSiteFeed, $wgSitename, $wgAdvertisedFeedTypes;
1849                         $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1850
1851                         if ( $wgOverrideSiteFeed ) {
1852                                 foreach ( $wgOverrideSiteFeed as $type => $feedUrl ) {
1853                                         $tags[] = $this->feedLink (
1854                                                 $type,
1855                                                 htmlspecialchars( $feedUrl ),
1856                                                 wfMsg( "site-{$type}-feed", $wgSitename ) );
1857                                 }
1858                         } elseif ( $this->getTitle()->getPrefixedText() != $rctitle->getPrefixedText() ) {
1859                                 foreach ( $wgAdvertisedFeedTypes as $format ) {
1860                                         $tags[] = $this->feedLink(
1861                                                 $format,
1862                                                 $rctitle->getLocalURL( "feed={$format}" ),
1863                                                 wfMsg( "site-{$format}-feed", $wgSitename ) ); # For grep: 'site-rss-feed', 'site-atom-feed'.
1864                                 }
1865                         }
1866                 }
1867
1868                 return implode( "\n", $tags );
1869         }
1870
1871         /**
1872          * Return URLs for each supported syndication format for this page.
1873          * @return array associating format keys with URLs
1874          */
1875         public function getSyndicationLinks() {
1876                 return $this->mFeedLinks;
1877         }
1878
1879         /**
1880          * Generate a <link rel/> for an RSS feed.
1881          */
1882         private function feedLink( $type, $url, $text ) {
1883                 return Html::element( 'link', array(
1884                         'rel' => 'alternate',
1885                         'type' => "application/$type+xml",
1886                         'title' => $text,
1887                         'href' => $url ) );
1888         }
1889
1890         /**
1891          * Add a local or specified stylesheet, with the given media options.
1892          * Meant primarily for internal use...
1893          *
1894          * @param $media -- to specify a media type, 'screen', 'printable', 'handheld' or any.
1895          * @param $conditional -- for IE conditional comments, specifying an IE version
1896          * @param $dir -- set to 'rtl' or 'ltr' for direction-specific sheets
1897          */
1898         public function addStyle( $style, $media='', $condition='', $dir='' ) {
1899                 $options = array();
1900                 // Even though we expect the media type to be lowercase, but here we
1901                 // force it to lowercase to be safe.
1902                 if( $media )
1903                         $options['media'] = $media;
1904                 if( $condition )
1905                         $options['condition'] = $condition;
1906                 if( $dir )
1907                         $options['dir'] = $dir;
1908                 $this->styles[$style] = $options;
1909         }
1910
1911         /**
1912          * Adds inline CSS styles
1913          * @param $style_css Mixed: inline CSS
1914          */
1915         public function addInlineStyle( $style_css ){
1916                 $this->mScripts .= Html::inlineStyle( $style_css );
1917         }
1918
1919         /**
1920          * Build a set of <link>s for the stylesheets specified in the $this->styles array.
1921          * These will be applied to various media & IE conditionals.
1922          */
1923         public function buildCssLinks() {
1924                 $links = array();
1925                 foreach( $this->styles as $file => $options ) {
1926                         $link = $this->styleLink( $file, $options );
1927                         if( $link )
1928                                 $links[] = $link;
1929                 }
1930
1931                 return implode( "\n", $links );
1932         }
1933
1934         protected function styleLink( $style, $options ) {
1935                 global $wgRequest;
1936
1937                 if( isset( $options['dir'] ) ) {
1938                         global $wgContLang;
1939                         $siteDir = $wgContLang->getDir();
1940                         if( $siteDir != $options['dir'] )
1941                                 return '';
1942                 }
1943
1944                 if( isset( $options['media'] ) ) {
1945                         $media = $this->transformCssMedia( $options['media'] );
1946                         if( is_null( $media ) ) {
1947                                 return '';
1948                         }
1949                 } else {
1950                         $media = 'all';
1951                 }
1952
1953                 if( substr( $style, 0, 1 ) == '/' ||
1954                         substr( $style, 0, 5 ) == 'http:' ||
1955                         substr( $style, 0, 6 ) == 'https:' ) {
1956                         $url = $style;
1957                 } else {
1958                         global $wgStylePath, $wgStyleVersion;
1959                         $url = $wgStylePath . '/' . $style . '?' . $wgStyleVersion;
1960                 }
1961
1962                 $link = Html::linkedStyle( $url, $media );
1963
1964                 if( isset( $options['condition'] ) ) {
1965                         $condition = htmlspecialchars( $options['condition'] );
1966                         $link = "<!--[if $condition]>$link<![endif]-->";
1967                 }
1968                 return $link;
1969         }
1970
1971         function transformCssMedia( $media ) {
1972                 global $wgRequest, $wgHandheldForIPhone;
1973
1974                 // Switch in on-screen display for media testing
1975                 $switches = array(
1976                         'printable' => 'print',
1977                         'handheld' => 'handheld',
1978                 );
1979                 foreach( $switches as $switch => $targetMedia ) {
1980                         if( $wgRequest->getBool( $switch ) ) {
1981                                 if( $media == $targetMedia ) {
1982                                         $media = '';
1983                                 } elseif( $media == 'screen' ) {
1984                                         return null;
1985                                 }
1986                         }
1987                 }
1988
1989                 // Expand longer media queries as iPhone doesn't grok 'handheld'
1990                 if( $wgHandheldForIPhone ) {
1991                         $mediaAliases = array(
1992                                 'screen' => 'screen and (min-device-width: 481px)',
1993                                 'handheld' => 'handheld, only screen and (max-device-width: 480px)',
1994                         );
1995
1996                         if( isset( $mediaAliases[$media] ) ) {
1997                                 $media = $mediaAliases[$media];
1998                         }
1999                 }
2000
2001                 return $media;
2002         }
2003
2004         /**
2005          * Turn off regular page output and return an error reponse
2006          * for when rate limiting has triggered.
2007          */
2008         public function rateLimited() {
2009
2010                 $this->setPageTitle(wfMsg('actionthrottled'));
2011                 $this->setRobotPolicy( 'noindex,follow' );
2012                 $this->setArticleRelated( false );
2013                 $this->enableClientCache( false );
2014                 $this->mRedirect = '';
2015                 $this->clearHTML();
2016                 $this->setStatusCode(503);
2017                 $this->addWikiMsg( 'actionthrottledtext' );
2018
2019                 $this->returnToMain( null, $this->getTitle() );
2020         }
2021
2022         /**
2023          * Show an "add new section" link?
2024          *
2025          * @return bool
2026          */
2027         public function showNewSectionLink() {
2028                 return $this->mNewSectionLink;
2029         }
2030
2031         /**
2032         * Forcibly hide the new section link?
2033         *
2034         * @return bool
2035         */
2036         public function forceHideNewSectionLink() {
2037                 return $this->mHideNewSectionLink;
2038         }
2039
2040         /**
2041          * Show a warning about slave lag
2042          *
2043          * If the lag is higher than $wgSlaveLagCritical seconds,
2044          * then the warning is a bit more obvious. If the lag is
2045          * lower than $wgSlaveLagWarning, then no warning is shown.
2046          *
2047          * @param int $lag Slave lag
2048          */
2049         public function showLagWarning( $lag ) {
2050                 global $wgSlaveLagWarning, $wgSlaveLagCritical, $wgLang;
2051                 if( $lag >= $wgSlaveLagWarning ) {
2052                         $message = $lag < $wgSlaveLagCritical
2053                                 ? 'lag-warn-normal'
2054                                 : 'lag-warn-high';
2055                         $wrap = Html::rawElement( 'div', array( 'class' => "mw-{$message}" ), "\n$1\n" );
2056                         $this->wrapWikiMsg( "$wrap\n", array( $message, $wgLang->formatNum( $lag ) ) );
2057                 }
2058         }
2059
2060         /**
2061          * Add a wikitext-formatted message to the output.
2062          * This is equivalent to:
2063          *
2064          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
2065          */
2066         public function addWikiMsg( /*...*/ ) {
2067                 $args = func_get_args();
2068                 $name = array_shift( $args );
2069                 $this->addWikiMsgArray( $name, $args );
2070         }
2071
2072         /**
2073          * Add a wikitext-formatted message to the output.
2074          * Like addWikiMsg() except the parameters are taken as an array
2075          * instead of a variable argument list.
2076          *
2077          * $options is passed through to wfMsgExt(), see that function for details.
2078          */
2079         public function addWikiMsgArray( $name, $args, $options = array() ) {
2080                 $options[] = 'parse';
2081                 $text = wfMsgExt( $name, $options, $args );
2082                 $this->addHTML( $text );
2083         }
2084
2085         /**
2086          * This function takes a number of message/argument specifications, wraps them in
2087          * some overall structure, and then parses the result and adds it to the output.
2088          *
2089          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
2090          * on. The subsequent arguments may either be strings, in which case they are the
2091          * message names, or arrays, in which case the first element is the message name,
2092          * and subsequent elements are the parameters to that message.
2093          *
2094          * The special named parameter 'options' in a message specification array is passed
2095          * through to the $options parameter of wfMsgExt().
2096          *
2097          * Don't use this for messages that are not in users interface language.
2098          *
2099          * For example:
2100          *
2101          *    $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>", 'some-error' );
2102          *
2103          * Is equivalent to:
2104          *
2105          *    $wgOut->addWikiText( "<div class='error'>\n" . wfMsgNoTrans( 'some-error' ) . '</div>' );
2106          *
2107          * The newline after opening div is needed in some wikitext. See bug 19226.
2108          */
2109         public function wrapWikiMsg( $wrap /*, ...*/ ) {
2110                 $msgSpecs = func_get_args();
2111                 array_shift( $msgSpecs );
2112                 $msgSpecs = array_values( $msgSpecs );
2113                 $s = $wrap;
2114                 foreach ( $msgSpecs as $n => $spec ) {
2115                         $options = array();
2116                         if ( is_array( $spec ) ) {
2117                                 $args = $spec;
2118                                 $name = array_shift( $args );
2119                                 if ( isset( $args['options'] ) ) {
2120                                         $options = $args['options'];
2121                                         unset( $args['options'] );
2122                                 }
2123                         }  else {
2124                                 $args = array();
2125                                 $name = $spec;
2126                         }
2127                         $s = str_replace( '$' . ( $n + 1 ), wfMsgExt( $name, $options, $args ), $s );
2128                 }
2129                 $this->addHTML( $this->parse( $s, /*linestart*/true, /*uilang*/true ) );
2130         }
2131
2132         /**
2133          * Include jQuery core. Use this to avoid loading it multiple times
2134          * before we get usable script loader.
2135          */
2136         public function includeJQuery() {
2137                 if ( $this->mIncludeJQuery ) return;
2138                 $this->mIncludeJQuery = true;
2139
2140                 global $wgScriptPath, $wgStyleVersion, $wgJsMimeType;
2141
2142                 $params = array(
2143                         'type' => $wgJsMimeType,
2144                         'src' => "$wgScriptPath/js2/js2stopgap.min.js?$wgStyleVersion",
2145                 );
2146                 $this->mScripts = Html::element( 'script', $params ) . "\n" . $this->mScripts;
2147         }
2148
2149 }